Reliability and Validity of the Turkish Translation of Pedsql™ Multidimensional Fatigue Scale in Duchenne Muscular Dystrophy

Abstract

Objectives: To perform the Turkish translation, reliability, and validity study of the PedsQL (TM) -3.0 Multidimensional Fatigue Scale (PcdsQL-MFS) in patients with Duchenne Muscular Dystrophy (DMD). Methods: This prospective, cross-sectional, observational study was held in Hacettepe University, Faculty of Physical Therapy and Rehabilitation between January 2016-August 2018. Turkish translation of the PedsQL-MFS was conducted based on the steps addressed in the translation manual of the original research. The psychometric features of the Turkish version of PedsQL-MFS including feasibility, internal consistency, and test-retest reliability, construct, and criterion-related validity as well as parent/child agreement were investigated on a total of 71 children and their parents. Results: The mean age of boys with DMD included in the study was 102.94 +/- 23.23 months with a mean 17.15 +/- 2.98 BMI. Internal consistencies of Child Self Report General Fatigue, Sleep/rest Fatigue, and Cognitive Fatigue items were 0.74, 0.65, and 0.83 while. 0.89, 0.84, and 0.91 in Parent Proxy Report. The ICC values of Child Self Report and Parent Proxy Report were 0.87 and 0.91. respectively. Parent Proxy Report succeded more acceptable fit indices than Child Self Report. A statistically significant correlation was found between PedsQL-MFS and PedsQL-Neuromuscular Module (p<0.05). Moderate agreement was detected between parent and child. Conclusion: The Turkish version of PedsQL-MFS was determined to be a reliable and valid tool to evaluate fatigue in 5-12 years old, ambulant children with DMD.